﻿#region Copyright Notice
// 
// 
//  
//  Copyright (c) 2009-2011 Anindya Chatterjee
//  
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//  
//      http://www.apache.org/licenses/LICENSE-2.0
//  
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
// 
// 
#endregion
using System.Runtime.InteropServices;

namespace AbstractClass.NPerf
{
    internal class TimeMonitor
    {
        /// <summary>
        /// Gets frequency of high frequency timer.
        /// </summary>
        public static long Frequency
        {
            get
            {
                long freq = 0;
                QueryPerformanceFrequency(ref freq);
                return freq;
            }
        }

        /// <summary>
        /// Gets counter of high frequency timer.
        /// </summary>
        public static long Value
        {
            get
            {
                long count = 0;
                QueryPerformanceCounter(ref count);
                return count;
            }
        }

        [DllImport("KERNEL32")]
        private static extern bool QueryPerformanceCounter(ref long lpPerformanceCount);

        [DllImport("KERNEL32")]
        private static extern bool QueryPerformanceFrequency(ref long lpFrequency);
    }
}